Man, If you haven`t tried a SpiderII I suggest you drop what you are doing and run to your nearest store (even if it is with your pants around your ankles) and try the 12" 70 watt amp.
It is bigger than you want, but goes for 299USD(I think) and has many more features than the 3owtt aversion.
The SpiderII`s are about (roughly) 679832 times better than the Spiders. Although I dont own 1,I would sell my Laney vc50(full tube) to buy one, If I had not just ordered a Pod XT Live.
Those amps are incredible...I promise you that if you try it out, you will buy it...especially cool sounds are made by the INSANE setting (both green and red)
Give it a shot.