I like the LINX products. Buy from Bruce.
http://www.rentron.com/PicBasic/RemoteControl.htm

Generally speaking, the lower the frequency the longer the range given the power is equal at the antenna.

The higher freqs have the advantage of being able to pass through small openings. So it is harder to block the signal. Sometimes increasing the effective range over the lower freqs.

As far as FCC goes, it is a good idea to read and maybe understand Part 15 of 47 CFR.

Some frequencys are legal only at certain powers.

Make sure you use an antenna that is matched to the frequency being used. Dave Houston has good info on his site. Worth a read.
http://davehouston.net/