dspic30f4011 crystal oscillator configuration confusion
What I read, contradicts your info, perhaps due to versions of datasheet.
Oscillator System VERSION 1 &amp; 2
Page 8   2007
5: XTL – XTL Crystal Oscillator mode (200 kHz-4 MHz crystal).
6: XT – XT Crystal Oscillator mode (4 MHz-10 MHz crystal).
7: HS – HS Crystal Oscillator mode (10 MHz-25 MHz crystal)
Version 2 enables HS mode to the PLL for more Xtal options.
Rule of thumb is you can try XT mode which uses less power and if start problems occur at higher temperatures ( lower CMOS gain) then use HS mode 10~25MHz with  HS/2,/3 and PLL x4, x8, x16 options.
EC mode is limited to 0 ~ 40MHz and not 110.592 MHz which must go thru a prescaler if necessary to get below 40MHz AND use a synchronous clock.