What cartridges under $800 outperform DL-103R?


I have a brass plate on my nude DL-103 and I'm ready for a change. I'm looking for more air and ambiance, but don't want to sacrifice extension on either end.

I'm debating whether to try Uwe's Panzerholz body on a 103R, or try something altogether different like a Dynavector 20XH, Sumiko Blackbird, Lyra Dorian, Zyx R50 Bloom. I had a Benz Glider L2 (0.4 mV) for a while, but didn't find it any better than the 103R. My tonearm is Micro Seiki MA-707.

Any insights or suggestions would be greatly appreciated.
mingles
Thanks to everyone who replied on- and off-line. I appreciate the comments and suggestions.

I just purchased a Soundsmith retipped 103R potted in an ebony body. The retip is ruby cantilever with a nude contact line diamond. It probably won't be the end of my cartridge search, but the price was right and I feel like I should check it out. I've been interested in an ebony body for quite a while. The SS retip is gravy on top.

The Shelter 501 sounds appealing. Someone offered to loan me their 901. I should take them up so I can do a direct comparison with the 103R-SS.

What is the opinion on buying used cartridges? One never knows what you're getting when you buy used. You never really know how the previous owner cared for the cartridge or whether they mounted it correctly, or how many hours are on it. You have to trust the seller to disclose this info honestly. Any thoughts on this would be appreciated.
To better a 103R in that price range, I'd be curious regarding the enhancements Soundsmith or others provide for the 103R itself.
12-19-08: Johnbrown
Kkurtis-

Thanks for your notes on the Denon DL-S1. I've often wondered if that cart would be a more refined 103 or 103r, but as you said, it's rarely reviewed, even on the blogs (occasionally someone will seek an opinion on VA, but only the crickets respond).
I seem to remember a post here from Ed Kobesky, reviewer for Positive Feedback online, that was very positive for the Denon DL-S1. You might want to see if you can find anything from him, or just PM him from Audiogon.
Mingles,

Have you received you Soundsmith retipped 103R potted in an ebony body? I want to hear about it.

Personally, I'm hesitant to purchase a used cartridge. I think it's the riskiest of all used audio hardware purchases (cables probably being the least risky). I'm just too risk adverse when it comes to carts.