Yeah..tube amps are a strange beast when you are used to solid states. Just understand this. Wattage is going to be lower on them. 50 watts on a tube amp is louder than 100 watts on a solid state amp. 50-60 watts will be more than you will ever need. Actually, if you like dirty/overdriven tone, a 30 watt tube amp will be awesome. The louder the clean channel goes, the more the tubes saturate and give you natural overdrive/distortion. The higher the wattage, the higher you can turn them without them breaking up.
As far as the Peavey and Crates go. The crates are no longer produced. You can find them on ebay very easily. The peaveys are still made but the cost is out of your range for the new ones. Used, you can find them in your range on ebay on average.