You could try the Danelectro Cool Cat Transparent Overdrive for $39. Yes, it's a great bargain. It can be bright and glassy if you want it, or not, and you have a bass control. This one is true bypass.
I'd try this before the TS808 RI. The TS808 is going to be closer to the Cusack than the TS-9, and it's got a better buffer in it.
But what I'd do is take either your amp into the store, or fire up a Marshall JVM 205 (see if you can take it and a cab into a room where you can crank it) on OD Green and set everything at noon, grab a bunch of overdrives like these:
TS808, TS9, TS9X, and TS7
Maxon OD808
SD-1
Dano Cool Cat TOD
Fulltone Robin Trower Signature Overdrive
MXR Zakk OD
And see which one does the job for you at a price you can afford.
I find it quite ironic that in these bad economic times that companies like Maxon raise prices on their stuff from $130 to $160. But Fender and Gibson did the same thing.