Best Spitfire MK IX?

Eduard - both 1/48 scale.

Early version:

https://www.eduard.com/store/eduard/spitfire-mk-ixc-early-version-%28reedition%29-1-48.html?cur=2&listtype=search&searchparam=spitfire

Late version:

https://www.eduard.com/store/Eduard/Spitfire-Mk-IXc-late-version-1-48.html?cur=2&listtype=search&searchparam=spitfire

I'm currently building the Tamiya IX.  It is fantastic.

I don't have the ROG Spitfire mentioned earlier, but if their 1/32 kits of German warbirds like the He111 (I have built that one), or the Ju88, Me109G, and Fw190 (all in my stash) are any indication, their Spitfire will be a great value for considerably less $$$$ than the Tamiya kit.

Any recent Tamiya kit will be a good build, & the Tamiya 1/32nd Spit is drop-dead georgeous!

2006 roundup here: http://www.ipmsstockholm.org/magazine/2006/11/stuff_eng_benshahar_spitfires.htm

Misses out the Italeri beer truck & the Eduard MK9, both nice kits.

Partial round-up here: https://www.scalemates.com/search.php?fkSECTION%5B%5D=All&q=Supermarine+Spitfire+1%3A48+mk+9*

ICM, Revell & EDUARD 1/48th kits readily available on the UK pages of a well-known auction site, as are Airfix and Italeri, but not a Tamiya MK ix

good luck

I recently did the new ROG release as a commission and IMO it is very well made and detailed. Most important they run about $30.

ROG has been turning out some nice 1/32 models for very good prices. I posted my completed build herevin the Aircraft section.