Yeah, I'm getting one but I'm not sure what.

I have on my board:
Line 6 DL4
Behringer Digital Delay
Boss DS-1
Boss Tuner TU-2
Boss Phase Shifter
Amp footswitch for clean/dist and boost

And a Ibanez Wheeping Demon and old Digitech multi FX at home when I want.

What I want:

I'm open to almost anything though, I have a range of like $60-140 US.

Go nuts.