From that pic I can say pretty easily . . . HOLY SH!T! ;-)
Looks pretty deep, but if you like the guitar go ahead and get a refret, even if it were a cheap RG 350 if you like the tone and the feel it's worth the cost.
Just ask around and find someone that won't just slap them on, even if it costs a little more to get it done right, new frets with last for years if installed properly.
My RG 550 is 15 years old, been through hell and back twice and still has the original frets, leveled and crowned by me only once (when I still had access to the tools and only because I was bored

) and it still plays great.
Mic