Actually, this may be a tougher question/answer-post than you want to know (We noticed no one has replied yet).
Summit has/was the lowest (NO DISCOUNT), however, Jeg's matched their price, and we went with Jeg's.
We buy quite a few items from OPG, and when Judy and I were in So. Cal. a couple of weeks ago to purchase some items from them, they personally stated to us that they would have matched the price(s) on our Auto Meter guages.
Others might do the same? Who will chime in?
Hope this helps.
Team Members Forever #341
Richard, Judy, MAXX2
'69 Elke (Frame Off); GM HO 350/330-Mildly Ported Vortec Heads-Manley Severe Duty SS 2.02/1.60 Valves, Comp Cams Full Roller Package (Magnum)-Custom Grind CS 3315/3316 HR112-.510/.520 Lift, Edelbrock Air-Gap W/750 Performer Manual Choke-Performer 100 HP NOS, March Pulleys, 4L60 (Non Computer) W/Lokar Shifter, 12 Bolt Posi.