If you wanted something higher pressure, Schwalbe made a 16 in. and 20 in. Marathon RACER tire that is 85 psi max and has the level 4 protection too! I'm using the 16 in. RACER on the front of my 2007 EZ-1 SX now as my recumbent shop didn't have any of the Marathon Original (Greenguard) tires in stock. I've used the Maxxis Hookworms, they are a really good and tough commuter tire IMHO. I'm not sure they make the 16 in. version but some shops might still have some stock? The Kwest tires well they SUCK, they get a flat just looking at a thorn IMHO, even the rare one's that have the supposed "kevlar insert" were very flat prone! FYI.
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Take Care, Ride Safe, have FUN! :)
Jo: 2009 ICE Trice T
BJ: 2011 ICE Sprint Special Edition