I have the UAD-1, and use it extensively. I decided to go with it first, and get the TC card later, based on the strength of its vintage gear emulations (
the LA-2A in particular is a-verrah-verrah-nahhhs!). The Realverb Pro is very usable as well, and the morphing abilities make the user interface extremely quick to experiment with (have two different presets that you like, buit neither one is quite right? Select them both, and morph between them!).
I already have some TC outboard gear, so I decided that it made no sense to duplicate that functionality in plugins to start with- the UAD-1 was the only way to go for me. However, I do intend to get a Powercore at some point moving forward. I have seen posts in other forums from people who use both simultaneously.
Your call! But between the Nigel instrument processor, the 1176, Pultec, and LA-2A emulations, and yes even that reverb,
the UAD-1 can stand up pretty well.
Now, what I really want is for the PSP folks to port
VintageWarmer to *either* of those cards. If they ported it to the TC, that'd make an instant sale for me. I love that plugin...