i think the
yamaha hex rack is the best one out there. there are alot of companies that i have irrational, foundation-less aversions toward, and
yamaha is one of them, so i would never buy it, but it does look like a great rack system.
pearl is another company i feel reluctant about, but their racks are square look pretty good, too.
those two racks would be the best to avoid slipping, i believe, which is a constant concern for rack-users. toms mounted on tube racks tend to slip if not tightened to extremes, i guess. i have never used a rack, but this is what i hear about them.
so, to avoid slipping, avoid round racks.
i dont think slipping is something that would deter me from buying a rack from a company i like.
i would go with
gibraltar, just because i dont think that i would personally be too concerned with slipping, but that may be a big regret when i do buy a rack. we will see.
as for roto toms, i say go for it! i will get some eventually, just to have some fun with

i dont know if i would go for the
remo rotos, though.
remo is obviously a very prestigious brand, but because of that, they are very expensive. would you like to spend $270 on an addition that is more for fun than anything else? or would you like to save $170 by purchasing the brand that is cheaper and less prestigious, one that i am surprised even makes rotos?
whatever your choice, here is a link to buy a rotary kit from
PULSE:
Buy Pulse Pro Rotary Tom Set | Add-On Packs | Musician's Friend
these guys are mostly cheap percussion, but with such a big difference in price, im going to go with the quality set-back and the financial savings when i decide to get roto toms. i would never buy anything else besides maybe sticks from
pulse, but this particular deal is too much of an advantage to me.
i have never seen these roto toms from
pulse, so they could be crap that falls apart in a few months. i dont know.
hope this helped.
btw, when are you gonna get pictures up of that sweet set???