Out of site, out of mind...
Really depends on what you want to do, the limitations of one antenna can be a drag and depends on what your doing with the hobby. I myself usually have 4-5 radios going at a time and a streaming scanner that's on 24/7 365...I would hate to have to switch things cause I want to talk on my ham gear.
If you have an attic or crawlspace, shove a discone in there, if both your cable runs are more than 30ft, avoid RG58 type cables, run some GOOD VHF/UHF coax like DavisRF Bury Flex 9914, it's very good for both antennas, better than 9913, (which can have water problems due to cavities in the cable) spec is close to LMR400 and no special connectors needed, and, its flexible and will outlive you.
The X-50 will do fine for most anything you do, but with 800mhz simulcast systems like we have here in the Phoenix Metro Area, if the signal is not clean and strong its pretty painful to listen to, hence a antenna with 800mhz properties and low loss cable. It becomes an issue fast at 700/800/900mhz so I suggest investigating what others are doing in your area and what issues they may have, as its a good guess as to what you should expect.
The perfect situation is you have dedicated antennas designed to do what they need to do and good cable you'll never have to touch again, no compromising switching things back and forth AND a wife who is happy because you did it once and it was done right! Good Luck...