I recommend the Fender Hot Rod Deluxe (1x12)
Here's why:
First off, I am a tone FREAK and I have suffered too long from the use of cheap practice/gig amps. I finally decided to end my misery one day by purchasing an amp that will last me a lifetime.
That said, If you are looking for a hard rock/metal amp. this isn't for you.
The Hot Rod deluxe houses 40 tube watts and a 12 inch speaker. Even though 40 watts doesn't sound like much, it is as much as you need. (it blows my 160 watt (2x12) fender out of the water!) As far as gigging goes, it will over power anything in the bar (including drums if you want to!) It is a tube amp so the louder the better.
since it has only one speaker it is fairly small and pretty light as amps go (45 lbs.) so it is very portable and doesn't take up too much room in the house.
it features three channels (clean, drive, more drive) and spring reverb to die for.
They run for about $700 brand new but i got mine on ebay for under $500.
I've played out of a lot of amps and the hot rod deluxe is number one in my book. it's the best selling amplifier that fender ever made for a reason!