Might want to wait for a 457.
I have a 455 fluted varmint in grey laminate thumbhole stock with both 22LR and 17HMR barrels.
Both barrels are tack drivers. I kept the 17HMR barrel on it.
Downside for the 455 is the curved bolt handle and high throw. Can interfere with some optics using low/medium scope rings.
Put an $18 yodave spring kit in it and the trigger is now excellent.
The T1x I just got is a 22LR.
Also very accurate - I would have to believe the 17HMR will shoot just as well, my buddies still has not arrived for me to report anything.
Synthetic stock is not my cup of tea, I replaced it with another synthetic one however (T3x Varmint) as it has a longer LoP and a nice high comb.
Bolt throw is fantastic but not as smooth as the 455. Throw is slightly up, loads of scope clearance.
OEM trigger is adjustable down to about 18 ounces - needs 0 work other than adjust to your liking. Out of the box mine was 3#8ounces. No creep whatsoever.
The 457 is a 455 barrel with a T1x action in a wood stock, lol. I would buy one except for the IMHO ugly laser engraving on most models.