The URD GT pack looked good value, but old and they seemed to only offer either the Aston of Ford GT as more modern GT cars from 2018-2019
They also have the 2018 BMW M6
https://www.unitedracingdesign.net/product-page/bayro-egt-2018The EGT pack might be old (from the IMSA 2013 season or thereabouts) but that doesn't make it any less fun to drive. Probably my favourite mod for offline racing especially with some LMP2 and DP opponents.
https://www.unitedracingdesign.net/product-page/ac-egtURD also have a couple of nice modernish DTM packs. Again these are high quality and very driveable unlike the 2020 DTM car in Raceroom.
Mercedes, BMW and Audi from 2013 and 2015 seasons (6 cars total)
https://www.unitedracingdesign.net/product-page/ac-t5-full-packAnd from the 2018 season (3 cars total)....
https://www.unitedracingdesign.net/product-page/ac-t5-2018As Tim says, the Race Sim Studio mods are also fantastic quality and don't forget the VRC mods. They do a prototype pack from around 2000 ish which again is superb.
https://vrc-modding-team.net/show/package/2And while I'm here, there is the new 992 Porsche Cup from URD
https://www.unitedracingdesign.net/product-page/ac-darche-cup-2021And from the makers of the Daytona Prototype mod probably one of the highest quality mods out there, the P13C
https://www.iersimulations.com/p13c-home.htmlI have all of these and others and would happily race any of them. We are indeed spoilt for choice when it comes to AC!