Well, the Universal Height (taller) Aquia is model CST412MF in the two-piece version. The spec sheet shows the width of the porcelain base as 5" either side of center, so it's possible the supply coming from the floor could fit, depending upon its width and where it really comes from. You might need to pull the valve off the top of the water supply and replace it with something like this Dahl mini-ball valve so the handle doesn't bang against the porcelain: http://www.dahlvalve.com/PDF/Skirted..._Brchre_US.pdf
That same toilet is 27.5 inches long, and sits about 3/4" off the wall, so you are looking at 28.25 from the wall to the front of the bowl. Hopefully that will do it.
The Vespin II is 28-5/16 long, plus 3/4" off the wall, so you are looking at 29-1/16" from the wall to the front of the bowl. It's also wider than the Aquia, about 6" either side of center on the base, so your supply might not fit, although more precise measurements would be surer.
Terry has had good success with the Aquia and its washdown flush. People generally like the toilet, although it does have a smaller water spot than the Double-Cyclone toilets. However, it dumps a lot more water into the top of the bowl, which apparently compensates for some of the waste landing on the porcelain.
I assume that you have measured your rough-in, and that it's a standard 12 inches?
If neither of these do it for you, I can suggest some other Totos that come in a round version that is shorter. Because the seating position on a round and an elongated is basically the same (there's just more bowl in front of you), it may be that the Aquia would still have a good sitting position for you, even though it's about an inch more than you wanted.