This is a bit of a late reply...
Do you want the sampler to have a keyboard on it, or do you already have a keyboard to control it from? Have you considered Gigasampler? It's a software sampler that runs on your computer. It's probably a good cost-effective solution. Plus, assuming your PC has a CD-ROM drive, that solves the CR reading problem easily.
I have
a Kurzweil K2000 that I really like. I don't think you can get a new one for $1200, but you might find a refurbished or used one for even less. You'll end up getting more than just a sampler. It also has a very extensive synthisys architecture, a 32-track sequencer, a SCSI port, and a user-friendly interface.
Yes, you can use a sequencer from anywhere to control the sampler's sounds. The sequencer might be in the sampler itself, it might be in a different keyboard, or running on your computer. If you use a sequencer that's in a different keyboard, you just need to connect a MIDI cable between the two. Then you can have both keyboards playing back at the same time and it will be synchronized.
Another thing to consider with a sampler is whether or not you want to record your own sampled sounds. For example, do you want to record your own voice and play it back from the keyboard? There are a couple of ways to do it. Taking my K2000 as an example, I have an optional sampling module in it that lets me plug a microphone directly into the keyboard and record that way. Another way is that I can record my voice into my computer using my sound card and store it in a WAV file format. Then I can transfer that sound over the SCSI cable to the K2000. (So, I really don't need the sampling module). Also, instead of sending the sound over the SCSI cable, I could send it over a MIDI cable using the MIDI Sample Dump Standard. That's much slower, though. The advantage is that MIDI cables are a lot cheaper than SCSI cables, and they're allowed to be longer.
However, if you're only interested in using sounds from CDs, then maybe you can forget most of what I said. BUT, keep in mind...some CDs come with sounds that are already formatted to be loaded into your sampler, like Akai format. These are are easy. But some are just audio CDs. You'll have to sample them yourself somehow. So you'll need someway to record (sample) the sound.
Jim