It's easier and less expensive to convert a EG to a SG and with the EG you'll have everything you need for touring. Purchase the kit to remove the Tour-Pak, put a short shield on and you'll basically have a SG, you can do the reverse with the SG but it will cost you more. The SG also sits an inch lower so you lose some ground clearence and it's a harsher ride. If you purchase a newer limited EG it does not have the front bumper on the fender and the wrap around saddle bag guards making it's even closer to the SG when stripped down. I think for the money the EG is a better buy, since the SG is a stripped down version of the EG for the same price. IMHO.
added: see above :)