Uncommon preflop spot 50/100

[ike]

Party 50/100
Folded around 3 off the button, a seemingly solid player I'm not too familiar with (he seems to be a regular, I'll PM the sn to anyone interested who plays this game often) who openlimps, I limp next in with KTo, CO and button fold, sb limps, BB checks.
Flop: KT8 with a flush draw I have no piece of.
Checked to me, I bet, only the limper calls.
Turn: A no flush
check, bet, call.
River: 9 no flush
check, bet, call.

Postflop seems 100% standard, though if anyone disagrees I'd be glad to hear it, so I'm mainly concerned about preflop.
I don't find myself facing an openlimp from that late from someone whose play I respect very often and I wasn't sure what to do. My hand seems too good to fold, but I'm very unsure of this guy's range and probably not far (if at all) ahead of it, so I didn't want to isolate. So I limped. The fact that the CO and button were tightish and the blinds were morons made me particularly like the limp.