I had one and after 'fighting' for another one (girl) for a year, I won the battle over my husband!!! We finally got a girl on Dec 28.
Yes, it was twice the work - brushing hair, cleaning teeth, bathing, grooming, etc; twice the expenses - food, treats, vet bills, clothes (of course!), etc. but twice the FUN!
When I see them playing with each other, love each other, all the works and money are worth it! If I could choose again, I would do the same thing!
So my conclusion is..... YES, two please!!!!
Good Luck!!!!