I've been using the Rolls PM351. It is small, runs off a one spot, works great, sounds amazing, and is $80. It can also be used as a hardwired IEM solution (it's intended purpose). Prior to this I used a small Mackie mixer 402VLZ3, and then a 3 Leaf Enabler. I have my eyes on the the new OmniCabSim Deluxe and will probably pull the trigger once I can afford to since I'm looking for an affordable cab sim anyways.