Roth conversion vs rolling into solo 401k

Hi all, After I left my last job I moved my 401k to Fidelity and it became a rollover IRA. My income is now higher and I want to start doing a backdoor IRA but I can’t do this while I have the rollover IRA. It seems like my two options are either to do a Roth conversion which merges the rollover IRA into my Roth IRA. Or I can open up a solo 401k and roll the rollover IRA into that. Does it matter which option I choose? submitted by /u/GooseRage [link] [comments]