Dear Sir,
Thank you for your invitation & interest in our Company, this is YK from LEADconcept & I would be happy to assist you about your project.
I have read your Project description but can you provide me URL of your XCart website? Magento is definitely very strong platform, as our team already worked on it, so your decision of going to Magento is good.
Please drop me a message thru' Freelancer PMB, if you're interested in our Company, we can then start further discussion.
Look forward to hearing from you.
Regards,
YK
LEADconcept