After almost 6 months I'm going to finally be able to install my Rio Car! There's just one problem. I still don't have an AMP.

I've been looking at lots of different options, reading threads on this board, and I've nailed it down to 1 of 3 possible options. I'm hoping you can help me choose the best one.

My guides have been the following:
1. I don't want the amp to be visible. (if possible)
2. I want it to sound very good/excellent
3. I'm not big into base, so an amp that's all about changing your heart rythm isn't for me.
4. Value (I started looking for less than $200 but eventually doubled that)

The first is a blaupunkt PA-4100 . It's the best price(~$300), and uses less power than the others. It's also smaller. Supposedly it's good, but it's a class 'T' which I've heard is not as good as AB. (though blau. claims it IS as good)

Next is the nakamichi PA-2004 It's my least favorite of the 3 (it's pretty large) but a high end car audio specialist in town reccomended it. I can pick one up for $350.

Last is the massive audio rs25.4 it's supposed to be a reference level unit. (I understand reference is supposed to mean top notch.. am I correct?) This is my most likely choice in terms of quality (it's AB, and the case is shinny;) ) but at $400 it's NOT pocket-book friendly.

That's it. I'd VERY much like advice from 'those who know'. Even the peanut gallery is welcome to chime in.