Joel:
Hello. Welcome to the forum.
I've read your story and you might think that what I'm about to say is odd, but I'll say it anyway. I don't think you've really needed any treatment at all. 20k is a safe number, especially if you don't have any symptoms at all. One thing that is usually stressed by the top ITP Specialists is to treat the symptoms, not the numbers. You've had a lot of treatments thrown at you in a short time that may have been unnecessary. Most here would not treat at all with counts in the 30's; I wouldn't. People do not need 'normal' counts, only 'safe' counts.
Since ITP can be chronic, some people are on and off of treatments for many years. The side effects of those treatments take a toll. I'm not talking about short-term side effects, I'm talking about long-term damage that accumulates. Right now you seem to be a very healthy young man with lower than normal platelets. Once you start using these drugs, other problems can begin.
I would suggest a second opinion. The protocol for Rituxan is 4 treatments, not 8. There is research that suggests that even 4 treatments may be too many for ITP; the 4 dose standard was based on the dose used for lymphoma treatments. Studies have shown that patients responded to two treatments as well as they responded to 4, so 8 is definitely overkill. More is not beter. Once the B cells have been targeted, they are gone. More infusions won't do a thing. I consider Rituxan to be a heavy duty, toxic treatment. I've used it myself and did have health consequences from it. It can take 4 to 12 weeks after stopping Rituxan to see a response, so you need to give that more time.
As far as splenectomy, I wouldn't even consider that right now. ITP can resolve sometimes within the first year and if you have the splenectomy, you will never know if that might have happened. The spleen is important, especially for those with autoimmune disorders. Also, it is becoming a treatment of the past, very few doctors suggest it any more. The top ITP docs do not recommend it any more. It doesn't always work, can fail at any time, and there are better options these days.
The biggest problem I see now is that once you have Rituxan, the vaccines necessary prior to splenectomy are not effective for 6 to 12 months after the infusions. I can provide the data for you if you want. Splenectomy after Rituxan is not a good idea, especially since you are symptom free.
Another odd thing that might be hard to understand right now is that people with ITP are susceptible to blood clots. There are several reasons for this, but splenectomy raises that risk and it is life-long. If splenectomy does not work and you end up having to use other treatments, that can raise the risk even more.
I know that your main goal right now is to get platelets up and you are willing to do whatever it takes to do that. But there is so much more to learn about all of this and looking at the big picture is very important. You don't want to trade one problem for others.
I know that you are active and that seems to be the only problem with backing off of treatments. Some people do choose to treat because they don't want to give up their activities. I would like to at least suggest that you slow down a bit here. It isn't a race. Rituxan may very well work for you, there is still time.