Tubes for Jolida Fusion Preamp


I have a Jolida Fusion pre which takes 2 12AX7 and 2 12AT7 tubes. Looking to upgrade from stock tubes and request herein recommendations. Thanks.
mesch
Wolf, thanks for the followup. Have not yet moved on tube purchase, will soon.
Well, I ordered a set of Mullard tubes. CV 4024 (at7) and CV 4004 (ax7) platinum grade from Upscale Audio. Was looking to warm up the upper mids and lower treble and was advised they would do that. I will get back to everyone after a comparative listening session. It is likely that these will not be the only tubes I purchase, just my 1st foray into tube rolling. Thanks again.
Those AT7s with the gold pins are tempting and I hope they have those when my 4024s wear out.
My tubes have arrived. I will keep everyone posted as to my findings once I have installed them.
Gold Lion 12AX7 are what I've been using for the past 4 years in my preamp. Excellent performance across the entire frequency range, and won't break the bank.

http://www.cryoset.com/catalog/product_info.php?products_id=301&osCsid=7b000403923abb12045a75a9772973d7

They also make 12AT7 and 12AU7 versions of the tube.