I bought my saddle before my horse because I ride TONS of different horses right now and wanted my own saddle and if it doesn't fit my horse, well, i'll have to resort to my treeless, and that's fine with me
if you buy one with QH bars or semi-QH bars you will probably be ok unless you end up w/ a great big warmblood or draft... or a teeny little fine boned arab.... I think the semi-qh bars fit just about everything...... My western saddles fit almost everything i think... so does my english, it's an HDR, not the new QH HDR but just a semi-qh and it fits most everything... although I did try a stubben on my short fat qh one time and it didnt come anywhere NEAR fitting...
well my next horse will be a qh so you think ill be okay getting qh bars? how do you know if its qh bars?
saddles on the internet will always tell you what kind of bars they have, and most stores will have it on the information sheet about the saddle
edit: sorry i forgot this.... my saddle has full QH bars, but my 4-H horse is a QH and it fits horribly on him..... so it really comes down to the individual horse.... i can ride in my saddle on another qh and be fine