if you want to go one step fancier then an un-54, you can get tange/IRD QB-75. Ships with two alloy cups instead of one plastic like the UN does.

Prod info:
* QB-75 has alloy cups and body with a plated hollow CrMo spindle
* Sealed cartridge bearings
* Made in Japan by Tange Seki
* Only 240 grams