man, for a while, i really wanted the silverburst les paul.... but then i saw the one i have now...and...well i guess you know that turned out! on the overdrive, You should get the Digitech Hardwire overdrive, or this one: http://www.blackstaramps.co.uk/products/ht/htdrive .html
The digitech costs about 70 pounds, thats fuckin cheap for a valve overdrive!
On the Marshall, i have something very similar, just an older model, and i can't say a single bad thing about it! the drive is just perfect (with gain to 10, hah) and the clean is very nice! But what are you gonna do to your wah?