It's definitely important to get outside insight prior to buying a horse, even though I'm probably not the poster child for that. Although luckily, I have my trainer to help me and after riding for almost eight years, I've learned what I can and can't handle. The first few rides on her, I was almost to the point of regretting it, but after we got accustomed to each other and I realized what type of training and what life she had up until that point, I developed a bigger appreciation and understanding for her.. and now there's no place I'd rather be than at the barn!
Just remember to get a vet check on whatever horse you end up being interested in, and really research the pros and cons of whatever issues are brought to light.
It'll be worth the wait once you find that perfect horse.