Seperate phono stage v.s. step up transformer


Fellow analog lovers help me with this dilemma. I have a Teres 265 turntable with a Graham 2.2 arm and a Lyra Helikon cartirdge. I just purchased a new preamp that has a terrific phono stage but, its' sensitivity is 2mV @47Kohms and the Lyra cartridge is only 0.22mV.
So I have 3 choices, get a new cartridge, get a seperate phono stage, or a step up transformer.
What would those of you with more experience in these things do? If it is change cartridge, which one? If seperate phono stage, which one? If a step up transformer can be used without sacrificing any detail, dynamics, etc. which one?
Thanks ahead of time to any of you that answer these questions.
agaffer
Thanks for the responses to my original question. I guess one of the questions I should have asked is if the step up transformer degrades the signal at all, or are the better ones like a good pre amp.
My fear that the transformer may add a unwanted sonic signature to the music made me take the safe route and I purchased a used Tom Evans Groove.
By the way, I can't beleive any of you would let Romy the Cat bait you into a dialog. There is always someone like him in any forum, they go away when ignored. I have several hobbies, audio, surfing, and keeping large (250lbs on up) land tortosies. Even those forums have guys like Romy. Clearly they are jus posers and should be paid no attention to.
this guy has a serious personality disorder, imho. BIG grain of salt here--just let the ranting rant, and let it go you all.
A high quality step-up transformer is a good way to go. Lower quality ones can interfere more with the sound. Even Kondo-san of Japan's Audio Note Ongaku fame requires a special step-up transformer with his top line cartridge. He states that it can do what no phono amplification circuit can, when dealing with very low output cartridges.

That said, I'm sure that you'll find enjoyment with the Groove you purchased. It is one of the most highly touted solid state phono sections.
Jyprez,

Thanks for the nice word. As I mentioned, I expect to be going away for a week or so in November. If you want to borrow the BentAudio trannies and do an a/b in your system, no problem. Then you can post a real world comparison.

Agaffer, glad to see you made a decision. Enjoy! I'm picturing a 250 lb. tortoise hangin' ten with a nice pair of Sennheisers on its head. That would be some Beach Boy.