My fiance and I went to Kessler's after we had already purchased an engagement ring at another store. Over the course of 3-months, we only had problem after problem with the first store and were able to finally return the first ring... we found solace in the staff at Kessler's.
The way they work is very different than most jeweler's. We were NEVER hassled about buying (I can't say that about the last jeweler), they offer you soda when you come in, play some classic rock music in the background, and just sit and chat about your plans, your wants and wishes for your jewelry, etc. They were absolutely wonderful.
The ring we picked out was actually slightly lower in clarity and color than our previous ring, meaning it was less expensive than the previous - BUT, it looks 10x better than the previous ring.
The other very positive thing about Kessler's is that your jewelry is guarenteed for life if you lose any of your stones... and that's a promise. You don't even have to have it inspected semi-annually like at the other stores.
Go there, you will not regret it.