Skilters are okay but they are rather noisy and not the most efficient. I would also not recommend a tall tank. Having less top surface area makes it much harder to maintain healthy parameters as well as increasing the cost budget on lighting if you have a mind for corals.
If you do not already have a tank purchased, I would suggest uping the size to a 45 gal
or the like. Believe it or not, larger tanks are much much easier to maintain than smaller ones. As for the skimmer, I would opt for a Aqua C w/maxi jet 1200 or a BakPak for a smaller tank (30 gal
under) or an Aqua C Remora Pro w/Mag 350 for a larger system (30-90 gal
). Don't go "thrifty" on this kind of equipment if you decide on getting one. You do get what you pay for and spending $30.00 may not sound like much but if the skimmer cannot keep up, it's $30.00 wasted.
I have a BakPak on my 27 gal
and it's at the limit of it's performance IMO