ready to drop the hammer an a new hk avr235

If the receiver has pre-out for the fronts; an outboard amp is fine for the fronts , many folks do this. I know of no way to alocate 2 of the other channels on this receiver to run as a biamp configuration. Many of the high-end receivers can do this; I doubt your model can. ---Not to worry; a better 2ch amp (if you have pre-outs) will make a good difference.---Make sure your front speakers can handle it.---And, do we have a sub??

Why would you want to hit it with a hammer?
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i do have a sub and a seperate amp. i was thinking with the big speaker small speaker thing, i could effectivly bi-amp the nht 2.5i and keep the same amp sound at all 5 channels. i may be able to spend a little more and get the larger avr635 (i think 635) with removeble power cord and 15 additional watts per channel. does the power cord warrent the upgrade? should i buy online and save money? i think there is about 250-300 price difference. does anybody know what the dynamic power is like on thies hk's? i know the onkyo(integra) is only about 30 additional watts for a total of 140 or 130 for the popular models.

if all else fails hit it with a hammer.

ok the other model i'm looking at is hk avr435 about 700. it comes with a much larger power cord. does this make much difference? most of the inputs will go unused. just dvd and sat auido. mabey vcr. cd player. none of the video, i dont see the need.

1-sell the carver and increase your budget by that amount.
2-bi-amping the right and left isn't helping as much as you think. On HT, the center and sub do the bulk of the work.
3-I think you touched on headroom. Some brands may be rated at less power but will sound bigger with less distortion due to better power supplies and lower distortion. Once and amp is pushed to clipping, it has to recover for any output to sound good. I really doubt that 50 watts will do it.
4-NHT's are great speakers. However, they definitely need/want more than 50 watts to come alive.
5-You need to decide if you will use all of the features on the HK. Denon will sound better and have more power, just less features.
6-Don't forget about the remotes. All HK's may not come with the same remote. Consider having to spend another $100+ on a universal remote if you get a cheaper model.
My final suggestion/comment: Make sure you get a center channel that is voiced the same as the r/l.