Cannot go wrong with an IOR:
301848 IOR 3-18x42 Tactical 35mm Rifle Scope
Matte
MP-8
35mm
Side Focus
First Focal Plane Reticle
Free IOR 35mm Medium Rings w/ Purchase
SWFA: $1,494.95
428562 IOR 4-28x56 Tactical 40mm Rifle Scope
Matte
Illuminated MP-8
40mm
Exposed Elevation
Side Focus
Free IOR 40mm High Rings w/ Purchase
Free IOR Sun Shade w/ Purchase
SWFA: $2,374.95
Or Sightron:
SIIISS624X50LRMD Sightron 6-24x50 SIII 30mm Riflescope
Matte
Mil-Dot
30mm
Side Focus
Target Knobs
SWFA: $789.95
SIIISS832X56LRD Sightron 8-32x56 SIII 30mm Riflescope
Matte
Dot
30mm
Side Focus
Target Knobs
SWFA: $824.95
Or the Zeiss Conquests
5214909943 Zeiss 4.5-14x50 Conquest Rifle Scope
Matte
Mil-Dot
1"
Side Focus
Target Knobs
Etched Glass
2nd Plane
SWFA: $899.95
5214509943 Zeiss 6.5-20x50 Conquest Rifle Scope
Matte
Mil-Dot
1"
Side Focus
Target Knobs
Etched Glass
2nd Plane
SWFA: $999.95
Or Cheaper:
426245T Bushnell 6-24x50 Elite 4200 30mm Rifle Scope
Matte
12x Mil-Dot
30mm
Rainguard
Side Focus
Free 5" Sun Shade w/ Purchase
SWFA: $569.95
SS10X42MB Basic SWFA SS 10x42M Kit
Matte
Mil-Dot
30mm
Side Focus
OK for .50 cal
Butler Creek Flip Ups
Super Sniper SunShade
SWFA: $429.95
Then of course there are the Leupold mk4's the glass is OK (VX-III glass) the M1 or M3 knobs are great though.
Also you can't go wrong with any Kahles, Schmidt & Bender, US Optics, Zeiss, Nightforce or Swarovski