RC300 - sold the Giant, with your list of other bikes might I suggest a 405? Complete the set (almost!). Nowt wrong with a bit of brand loyalty
Kona kid - I believe the Pace geometry predates the fisher genesis geometry (MBUK ages ago ran a most influential bikes ever and had Steve Worland's team RC 100 featured, looking back with its pre aheadset headset, bullseye cranks, genesis geometry, not round tubing it's spec wouldn't look out of place in shops today sort of)
Thought - was the real reason for ditching square tubes because everyone else uses squarish tubing these days? Round is the new square?