Each horse is completely individual, so just buying a saddle that "fits a lot of horses" is a waste of money. Such mythological saddle does not exist. Better wait till you have your own horse to find a saddle for.
If you're really set on getting a saddle, you can look into a treeless saddle.
Maybe you take lessons and want your own saddle to ride in....talk to the trainer and ask about the common wither size of all the horses you ride, and buy one. Best bet would be treeless. Posted via Mobile Device
This is not crazy at all, lots of people own saddles or want their own saddle that don't own horses.
There are two ways to go - one, buy a saddle with an adjustable gullet. This doesn't solve all saddle fit problems, but tree and gullet width are a big components of saddle fit.
I'm not familiar with the Wintecs you mentioned, so don't know if either of them have the adjustable gullet. I would also recommend reading some reviews of them.
The other way to approach the problem is to buy a wide tree saddle or a tree that's likely to fit the majority of horses you ride (meaning medium tree with high wither clearance if you're riding a lot of TBs, wide for most QHs or draft crosses) and then pad it to fit the variety of horses you might be riding. Not perfect, but doable.
I would also say that the liklihood of the saddle you buy now fitting a horse you might buy later is not terribly high, but if what you're after is something comfortable that fits you for right now, go ahead and do it.
I have a flex tree saddle that fits most every horse I ride. Only problem I have is with high withered horses the pommel will rest on their withers. In that case I use a navajo blanket under my pad and it solves the problem. Posted via Mobile Device
I don't think its strange at all to have your own saddle, even if you do not own a horse. You just need to be prepared to let it go if and when you do own a horse. I own my own saddle that I had fit for the TB I lease. I puts me in way better position than the saddle my trainer has for her. Its more comfortable for me and having my own is a must for showing. I love the saddle, but I do know that chances are I'll have to sell it next year when I purchase my own horse. I don't know about the Wintecs...but wanted to give my experience with owning a saddle without owning the horse.