For modulation all I'd really use is phase, flange, chorus, and tremolo w/ tap tempo. The thing is that I really like having different modes of phase, and flange, and then the ability to toggle through them with a footswitch, because if I'm playing live then I can't, and don't really like to bend over, and fiddle.
The phase 100 is pretty sick, but the best phasers around are the empress phaser, or the walrus audio vanguard. Waveform control is one thing, but having multiple is even cooler in my opinion, though nowhere near as usable. I really like the controls on the boss stuff, momentary could have some nice applications, as could rise, fall, and step. I'll probably go for the ph3, though I have no idea what the exp output is for.
I've got my eyes on a suhr riot clone of some sort; the movall scorpion looks pretty op, and I'm still waiting for a joyo/mooer/caline/genric affordable brand fuzz factory, because when I've finished building mine, there's a tiny chance it'll actually work.
The hotone soul press is very functional, as is the rocket train/rock highway, and the ehx stereo talking machine is just the shit.
The SD shapeshifter is a sick tremolo, as is the EHX super pulsar, and I could do stuff with them, though I wouldn't use them enough to justify purchasing one.
As far as chorus goes the new tri avatar from FTT is amazing!...ly expensive, but BOSS, and EHX make decent affordable chorus' though.
The ring thing is cool, but I wouldn't use it enough to buy it, however the mooer bit reducer, and slow gear clone, could be rreally useful.
They need to hurry up, and develop those money trees.