6x8 replacement speakers for my 14 Mustang GT 4 speaker "system"

[Redlinez]

I know a few of you are into car audio, so I thought I'd ask for opinions here. I think I'm down to two speakers. Here are the specs: Infinity Reference 6832cf- 49hz-21khz 93db 2-60w rms 2ohm rating (stating with 2 ohm wiring makes a true 4 ohm system), Pioneer TS-D6802R- 30hz-32khz 88db 2-60w rms 4 ohm. I don't really want to upgrade or mess with the stock stereo. I might possibly add a subwoofer later on, but no time soon. I kind of wondered if a 6.5 round would fit, but it shows on Crutchfield and Amazon it won't. Thanks for any help. I can get either one for about $60 shipped.