I have same configuration 75g tank and 29g sump. I have a AquaC UrchinPro with Mag3 pump. Very nice skimmer.
Greetings
+1MSX Extreme 160, Reef Octopus Extreme 160, or Vertex IN-100 are good. The MSX and Octo both have a Sicce pump - you can add the purple pinwheel for 30 bucks and super charge it
You can go in the review equipment area and look at different kinds of skimmers and their reviw. I got a recirculating Octo skimmer which mean it skimms twice and its great. Also think about putting a sock at the end of the line, a 1 or 5 micron is good to help your filtration. You need to change the sock every other day, but no worse than the skimmer cup. You wash the sock in the washing machine with no soak of anything. I got 3 socks so i don't have to wash only one at a time. And i don't need to wait for one sock to be washed to replace the soil ones.
For the price Octo is very good Reef Octopus DNW 150 Recirculating Protein Skimmer - AquaCave