The relative volume going from 4 to 10 on your guitar isn't nearly the same as having a solo boost of some sort when in a band situation. At home, you can perceive the volume difference, but with a band, you will get more gain but not necessarily more volume.
As Steve pointed out, you can use an EQ through your FX loop, a clean boost through the FX loop, or use an amp with a seperate solo boost & volume control on it to simplify things. (I use the 3rd choice)