Hmmmm...
I am biased in this department for two reasons.
1- Clients pay me for the time they spend with me. I need nearly absolute dependability. I cannot have a CPU overload because the song NEEDED one more compressor on the clean guitar track, etc......With analog processing it is simple, you either have it in the rack to use or you don't. If you do, it is going to work and not make the whole mixing system crash or hiccup, etc.....
2- The current state of dsp is totally inadequate for great sounding multi-track mixing! Everybody is coming out with software and plugin's, but little of it has predictable results on the audio. I could elaborate, and some don't agree, but I have some decent analog gear to compare to and that is what I feel.
This is the bottom line. Like all things audio, you truely most of the time get what you pay for. Cheap low end digital is better then cheap low end analog any day of the week. Mid level digital is usually a tad better then Mid level analog. High end digital cannot yet shake a stick at high end analog.
Now, you have to ask yourself some pretty important questions before you go the PC route.
1- Am I computer literate?
2- Do I have the time to deal with the many issues I will face configuring the PC and software
3- Do I have the time to LEARN all this software?
4- Will the PC hardware supply adequate number of tracks for my production goals at a price that makes it attractive?
5- Do I have the patience to mix with a mouse (this one is very important to consider). Those little interface dealies still have latency issues that make their use nerve racking.
6- Is all digital going to deliver the type of sound I really want?
A good DAW, capable of 24 tracks of audio, and offering the better applications and plugin's and a GOOD soundcard (one with GOOD chipsets for the A/D/A conversion) is going to set you back quite a bit. The problem with this route is that you really cannot be assured that it is going to work right out of the box unless you purchase a Turnkey system from someone who specializes in making multi track DAW's. At least with hardware or standalone recording gear, it works. No hard drive throughput issues to deal with. No running out of RAM issues, no software configuration issues, etc, etc, etc......YOU REALLY NEED TO TAKE THAT INTO ACCOUNT! Mainly because you have to ask yourself if you are willing to spend all the time you will need to deal with learning the software and dealing with the hardware issues in a PC environment. At times, it is daunting.
A PC multi track solution may be right for you. But, if the above is not very attractive to you, then it will not be, and you will find that it hinders your aim, which I am assuming is to purchase stuff that you can hook up and start recording, with minimal effort. Stand alone gear offers that. And, with everybody abandoning their stand alone gear to go to PC, deals on good gear are out there, so really, the price is not going to be all that different.
Think of this too. If your software is not well designed, and has problems that make it prone to crash on your particular hardware setup, you are at the mercy of the software company for them to re-write the code. With analog gear, if something starts acting funny, you get it fixed. Takes usually less then a week for that to happen...
I could go on, but I will go on record here yet again and say:
PC multi tracking sucks really bad! I would rather have a Tascam or Teac 4 Track reel to reel and a Mackie 1202 and a Alesis 3630 and a Digitech Effects Processor for my multi tracking needs then to rely upon a computer and software for it. Really......
Make your choice wisely. A lot of the opinions you have recieved so far are heavily biased because it is coming from people who have only worked in the PC environment for multi tracking, or never work with more the say 8 track in the analog/stand alone environment.
ametth stated that he has used both and told you to go stand alone. I have worked both and would suggest the same. Slackmaster has pointed out many things that are worth considering too.
PC MAY be right for you, but all in all, I think if you go that route, we are going to see many more questions from you trying to deal with all it's drawbacks then if you went the stand alone route.
Good luck.
Ed