Lee
I've been using a Vega 2600 for about 11 years or so and the way your going I think you'll have a nice bowl lathe. At 25" x 14" the 2 Hp with inverter and 3" to 7" and back pulley system it takes all of that to work that size,I think you need to look at your funding for a 3Hp motor. I do like the leg stance your using. The Vega legs are straight down from the corners and it WILL rock,I think Vega relies on the 550# to hold itself steady. Don't get me wrong I completely love my Vega but like everything it has it's own little quirks. Remember a little finesse with the pulleys and the VFD can always get you to a speed for pens.
Comments and Constructive Criticism Welcome
Haste in every craft or business brings failures. Herodotus,450 B.C.