Probably the most expensive & absolutely the coolest/rarest car was a real 1 of 6 made 1965 Daytona Cobra 427ci, but worth several million $$$'s, but I couldn't drive it, just sat in it making noises, like a little kid...
the fastest was a 245" rear engine dragster, former Coors Light Silver Bullet T/F old racecar, with an 14:71 Blown Enderle Injected alcohol 526ci Milodon Mastodon {latter had in my car} blew the tires off on a 5.90 @ 227mph, final licensing pass, but didn't get to run it again...
probably the fastest "feeling", truly an E-Ticket ride, was my S/E {7.90et class} or Comp Eliminator or AA/Gas 23 T Altered alcohol injected 6.90 @ 190's all day long, on a 125" wheel base F/C chassis, had several different engine trans combos, Lenco/Jeffco's, Power Glides & 727 Clutch-Flite's from 301ci 6.71:1 Blown Gas to 526ci 14.71:1 Blown Alky match racing combo & various other Injected combos too, Mopar & GM...
probably most fun car to drive, a friends car 1997 GTS Viper, got to near 200mph out by Vegas
or my 89 Camaro Outlaw P/S 7.00's @ hi-180's or 92 Trans Am Pro-Mod best 6.69 @ 217mph {2007 last competitive pass} or my 49 Ford Pro Gas best 7.20's @ 188mph or my 71 Camaro Super Comp 8.90 car back in 1984ish or my old 68 RR 3520#'s on drag radials & on 300 shot of juice 8.58 @ 156mph 2007, now that was a fun ride...
Having had a Pro &/or Comp license since 1977, I've driven allot of fast & cool cars, even went 160mph Outlaw Sprint Car on dirt...