the recommended cap are listed in your datasheet. usually 22pF is a nice choice.

In theory your SEROUT is good. BUT, to me, you still have to transmit it with the default baudrate.. so it doesn't solve the problem unless you buy the suggested module to reprogram them first.. waste of time and money to me.

BTW @19200 baud, for ANY reliable serial comm, i'll suggest you to use the PIC USART with HSERIN/HSEROUT instead.