If you are trying to form a cornerstone for future expansion, you should seriously consider the flexibility of separates. Finding an integrated 2ch amp with HT bypass is going to limit your options, not to mention empty your wallet. Consider buying a used pre/pro and separate amp. A quick perusal of audiogon.com noted multiple pre/pro's from Adcom, Paragon, Marantz and others that can be had for under $500 and there are a TON of great 2 channel amps that can be fit under your budget. Adcom, B&K, Threshold...you get my point. Going with separates will not only afford you more options, but it will allow you to tailor the sound exactly to your liking while offering the ultimate flexibility.

Consider it. You can save a lot of money buying gear off of "gear geeks." You know who I'm talking about; people with a terminal case of upgradeitis.

Hope this helps.