Add Lundahl MC transformers to Cary SLP98P

Should I buy a Step Up Transformer, or send my SLP98P to Cary Audio to add Lunddahl MC transformers. Phono input use for MM cartridge, and AUX input use for MC cartridge, Cary will install a second switch in rear for MM/MC cartridge selector. This will cost around $700 shipping included, with separate SUT and cable cost over $1400.
Is the sound good as separate SUT or not.
Anyone have done this to your SLP98P, please post feedback,
Sincerely,
KD