Regarding using yours for the Strat, you are not going to get the best possible tone using your instrument input (left side) as it is electronically designed for the high impedence signal for Acoustic pickups. But, you can get an adaptor (low-Z mic to 1/4 in. guitar jack) and run it through the microphone side of the amp. That side really is nothing more than a low powered PA system and you can use keyboards, electronic drum kits, or standard electric guitars with passive pickups such as your Strat. It won't be as loud as you might wish but you can put a pedal in front of it and use it to boost your signal. Either a treble boost or just about any overdrive will boost your output. You will get a clean signal and can even use some of the effects built in on the amp. But if you are looking for that fat sound, the amp will not drive it alone, so you will need some kind of pedal anyway to get the tone you are looking for. I even use that side of mine to play bass. Not at club levels but small gigs. Keep in mind that is not what it is intended for and if you decide to invest in a inexpensive amp, you will notice a fairly sustantial difference in quality but with a little imagination and the right setup, you can get what you are after with the A-30. Or you could think about trading it in for a decent tube amp that is designed for electric but will also handle acoustic very well. I have several amps including a messa and a few fenders, but I recently bought one of the Epiphone Jr. 5 watt half stacks and it is just as loud as your A-30, produces sweet blues and classic rock but also when I plug my Martin into it, it works quite well. And for $250, it's pretty hard to beat. So, there are a couple of ideas. Hope it helps and keep on pluckin.
Bruce