Need fast help picking preamp before its too late

Which should I get for my B&K st-140 and JM Labs Chorus 706?
tubes
Conrad Johnson PV7 $400
Musical Fidelity X-Pre $240

SS
Forte Audio Model 2 $300
PS Audio 4.6 $320
Mccormack micro line drive $300

Please help as I cant listen to my new (used) amp? The agony!